[docs] Small style changes (#2805)

This PR has some superficial style changes for the docs.

### Change Type

- [ ] `patch` — Bug fix
- [ ] `minor` — New feature
- [ ] `major` — Breaking change
- [ ] `dependencies` — Changes to package dependencies[^1]
- [x] `documentation` — Changes to the documentation only[^2]
- [ ] `tests` — Changes to any test code only[^2]
- [ ] `internal` — Any other changes that don't affect the published
package[^2]
- [ ] I don't know

apps/docs/content/sections.json

@@ -18,7 +18,7 @@
 		"title": "Community",
 		"description": "Guides for contributing to tldraw's open source project.",
 		"categories": [],
-		"sidebar_behavior": "hidden"
+		"sidebar_behavior": "show-links"
 	},
 	{
 		"id": "reference",